Which of the following statements is most likely to be incorrect ?

(A) $\mathrm{Ti}{\left({\mathrm{NO}}_{3}\right)}_{4}$ is a colourless compound

(B) ${\left[\mathrm{Cu}{\left({\mathrm{NCCH}}_{3}\right)}_{4}\right]}^{+}{\mathrm{BF}}_{4}^{-}$ is a colourless compound

(C) ${\left[\mathrm{Cr}{\left({\mathrm{NH}}_{3}\right)}_{6}\right]}^{3+}3{\mathrm{Cl}}^{‐}$ is a coloured compound.

(D) ${\mathrm{K}}_{3}\left[{\mathrm{VF}}_{6}\right]$ is a colourless compound

Concept Questions :-

Coordination comp,Introduction and Classification / Nomenclature
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Difficulty Level:

Identify the correct order of wavelength of light absorbed for the following complex ions.

${\left[\mathrm{Co}{\left(\mathrm{en}\right)}_{3}\right]}^{3+}$

I                                      II                                 III                                 IV

(A) III>I>IV>II

(B) II>IV>I>III

(C) III>I>II>IV

(D) I>III>IV>II

Concept Questions :-

VBT & CFT, Limitation /Hybridisation
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Difficulty Level:

The possible geometric isomers shown by ${\left[\mathrm{Co}\left(\mathrm{en}\right){\mathrm{Br}}_{2}{\mathrm{Cl}}_{2}\right]}^{-}$ is :

(A) 2

(B) 3

(C) 4

(D) 6

Concept Questions :-

Isomer in Coordination Compound
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Difficulty Level:

The total number of isomers of the complex, $\left[\mathrm{Co}{\left({\mathrm{NH}}_{3}\right)}_{4}{\left({\mathrm{NO}}_{2}\right)}_{2}\left({\mathrm{NO}}_{3}\right)\right]$ complex is :

(A) 10

(B) 6

(C) 4

(D) 12

Concept Questions :-

Isomer in Coordination Compound
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Difficulty Level:

Which one of the following complexes exhibit chirality ?

(A) ${\left[\mathrm{Cr}{\left(\mathrm{ox}\right)}_{3}\right]}^{3}$

(B) $\mathrm{cis}-\left[{\mathrm{PtCl}}_{2}\left(\mathrm{en}\right)\right]$

(C) $\mathrm{cis}-{\left[{\mathrm{RhCl}}_{2}{\left({\mathrm{NH}}_{3}\right)}_{2}\right]}^{‐}$

(D) $\mathrm{mer}-\left[\mathrm{Co}{\left({\mathrm{NO}}_{2}\right)}_{3}\left(\mathrm{trine}\right)\right]$

Concept Questions :-

Isomer in Coordination Compound
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Difficulty Level:

Which of the following has both fac-mer and optical isomers?

(A) $\left[\mathrm{Co}{\left({\mathrm{NH}}_{3}\right)}_{3}{\left({\mathrm{NO}}_{3}\right)}_{3}\right]$

(B) ${\left[\mathrm{Co}{\left(\mathrm{ox}\right)}_{3}\right]}^{3-}$

(C) $\left[\mathrm{Co}{\left(\mathrm{gly}\right)}_{3}\right]$

(D) none of these

High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

Assertion : In complex  the 'spin only' magnetic moment is close to 1.73 B.M.

Reason : All known mononuclear complexes of chromium (III), irrespective of the strength of the

ligand field, must have three unpaired electrons.

1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
3. If the assertion is true but the reason is false
4. If both the assertion and reason are false
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Difficulty Level:

Assertion : tris (ethane-1, 2-diamine) nickel(II) chloride is homoleptic outer orbital complex

Reason : The geometry of Ni in tris (ethane-1, 2-diamine) nickel(II) chloride is trigonal bipyramidal.

1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
3. If the assertion is true but the reason is false
4. If both the assertion and reason are false

Concept Questions :-

VBT & CFT, Limitation /Hybridisation
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

Assertion : Bis(dimethylglyoximato)nickel(II) can show geometrical isomerism.

Reason : Tetrahedral complexes with chiral structure exhibit optical isomerism.

1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
3. If the assertion is true but the reason is false
4. If both the assertion and reason are false

Concept Questions :-

Ligands
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Difficulty Level:

Assertion : The magnitude of charge density for a given ligand increases as the charge on the metal

ion increases.

Reason : ${\mathrm{NH}}_{3}$ is a weak field ligand towards ${\mathrm{Co}}^{2+}$ but acts as a strong field ligand towards ${\mathrm{Co}}^{3+}.$

1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
3. If the assertion is true but the reason is false
4. If both the assertion and reason are false

Concept Questions :-

VBT & CFT, Limitation /Hybridisation